Means for securing a metallic bridge to metallic lens rims



July 25, 1933. J. FIELDING I 1,919,938

MEANS FOR SECURING A METALLIC BRIDGE TO METALLIC LENS RIMS Filed April 8, 1931 I N VEN TOR.

A TTORN E YS.

I i This 'invention relatesf tto an mounting, and has for it sf 'object to connect a spri11g-;.bridge piece to the lens rim, w th-- T N TE JosnPHRrwHITA Ea;or'iAPPonAuG; n nonn ISLAND Means F012. sncunine A METALLIoJ- RIDGE mo-nnmntmcctniis Y "FQA pPlicat'i 1iifiIed A in s, 11931."

but subjecting the same to heat in such con 'necti'on'; a V L c Another object ofthei invention isthepro-f vision of a construction byqvhich a: better grade spring may be"used :and-. a better con-,; necting member for attaching the spr ng to the 'lens rim. 3 i

@Afurther objecto the invention "isthe provision of: a construction" which Willfibe less expensive tor joining thespring to the lens rim.

'- A still further objectis the Provision; (3i

i a: construction which ill/{provide an improved appearancewhen y ewed-ifrom the' front thereof. t i a l/Vith these and other objects in v ewythe invention consists of certain novel; features of. construction, as will bemorerfullyfdescribed, and particularlypointediout ma t appended claims.

rims connected-' b'y 1-' lrnp rove'd "bridge 7 mounting means,

Fig. 4 is a perspective view 'of one ofthe. connectingmembersy 3 Y Fig. 5 is a'central sectionalyietr through the spring and connectingjmember and lens I Fig. i6 isja sectionionf: line fi fi'o'f' Figurea In ophthalmic mountings, it is frequently desirable tofattach a'flat lea't spring tollens I I rims, which has been accomplished {bysol- .dering thefends of a spring to connections to the lens. rim by which the application of soldering heatanneals the spring to detri-j -mentally affect the same. 1 Connecting mem-i bers have been madejintegral with the ends of the springs forattachment toithe; lens 'rim, but it is found that the connecting members must be of a far more ductil'e'and pli- --able material than thespring memberin order that the same may-be" attached by bending, folding Or the Without" the use Jonnrrnrnme, OENORTHPROVIDENCE,BHODE ISi-ANDASSIGNOB ommmtmo "of and 1 thus a material must be used which is inferior forspring qualities; *and- I inorderto overcome these'difliculties, I have i pmyided? a construction by Which-the 'highestgrade springinaybe used and whiclrmay be attached to the lens Qrim Without the :use of heat and the following "is a detailed descriptionbf the present embodiment oft-his invention, illustrating the preferred means by which theseadvant'ageous results maybe accomplished. I i j With reference to the drawing, 10 designates thelenses surrounded 'by'rims 11,;in this illustration being preferably metallic;

Connecting members 12 in the form of soft,

pliablefductile material of flattened tubular forn are soldered to theirims 11, anda leaf 7 spring '13 of relatively hard, resilient stockis provided for the-bridge? with, recesses'for holes" l in; its oppositexends whichare ta-- pered slightly as at*l5J-fo'r insertion intothe H tubular sleeve 12 to abut against the closed end '18 thereof. The ends of the spring 13 are'heldfia'gai-nst theclosedend l8-ofjlthe member 12 by deflection ofjthe 'metal of the friins' 11 and thefs leeye l2 by forcingtheis'ame v inwardly tojprovidea projection' -or detent V 16' "from-the stocki of the sleeve extending i intoithe recess 14' or through the hole therein? Where one is 'provid-edi as illustrated infFig-f ure 5, to lock the end {o f fthe springiin-i the sleeve" and connect the rims-together.-; A

suitable, gauge, to locate "iElTiGIPOlIIt iofapplication of pressure '17 for. deflecting the stock of the 11 is provided;

be weakened and by which the connecting In this "manner, ".ithe' resilient bridge of hard sheet stock e'isfsecuredfto the lens-rims without the-use of solder and "without-the f necessity oi "bending jany *of Elthe'? hardened stock Whichfis" liable to -break" or: crack and means is invisible from thefa'ceof the mounting to improve the appearance of the construction thereof; b t The spring bridge used'isof a degree of h'ardnessand flexibility tocpermit thelens. Time to fold-or be moved one over the other for more compact storage of thepartsandfl thus it-willbefipbarent that a set may occur Y 1n the bridge iffit were soldered or heated 

